WATER AND SEDIMENT INFLOW OF HYPERCONCENTRATED FLOODS AND THE ASSOCIATED CHANNEL AGGRADATION IN THE YELLOW RIVER

ＷＡＴＥＲＡＮＤＳＥＤＩＭＥＮＴＩＮＦＬＯＷＯＦＨＹＰＥＲＣＯＮＣＥＮＴＲＡＴＥＤＦＬＯＯＤＳＡＮＤＴＨＥＡＳＳＯＣＩＡＴＥＤＣＨＡＮＮＥＬＡＧＧＲＡＤＡＴＩＯＮＩＮＴＨＥＹＥＬＬＯＷＲＩＶＥＲＺＨＡＯＹｅ＇ａｎ；ＰＡＮＸｉａｎｄｉａｎｄＦＡＮＺｕｏ...     

SOIL SCOUR RESISTANCE AND ARRANGEMENT OF SOIL AND WATER CONSERVATION SYSTEM IN THE CONTIGUOUS AREA OF SHANXI, SHAANXI AND INNER MONGOLIA 1

ＳＯＩＬＳＣＯＵＲＲＥＳＩＳＴＡＮＣＥＡＮＤＡＲＲＡＮＧＥＭＥＮＴＯＦＳＯＩＬＡＮＤＷＡＴＥＲＣＯＮＳＥＲＶＡＴＩＯＮＳＹＳＴＥＭＩＮＴＨＥＣＯＮＴＩＧＵＯＵＳＡＲＥＡＯＦＳＨＡＮＸＩ,ＳＨＡＡＮＸＩＡＮＤＩＮＮＥＲＭＯＮＧＯＬＩＡ１ＪＩＡＮＧＤｉ...     

COMPREHENSIVE MANAGEMENT OF SMALL WATERSHED FOR SOIL AND WATER CONSERVATION IN CHINA

ＣＯＭＰＲＥＨＥＮＳＩＶＥＭＡＮＡＧＥＭＥＮＴＯＦＳＭＡＬＬＷＡＴＥＲＳＨＥＤＦＯＲＳＯＩＬＡＮＤＷＡＴＥＲＣＯＮＳＥＲＶＡＴＩＯＮＩＮＣＨＩＮＡＤＵＡＮＱｉａｏｆｕ２Ｉ．ＧＥＮＥＲＡＬＣｈｉｎａｉｓｏｎｅｏｆｔｈｅｃｏｕｎｔｒｉｅｓｓｕｆｆｅｒｉｎ...     

ON THE PREDICTION OF TRANSIENT BED LEVELS DUE TO AGGRADATION AND DEGRADATION INCLUDING ARMOURING

ＯＮＴＨＥＰＲＥＤＩＣＴＩＯＮＯＦＴＲＡＮＳＩＥＮＴＢＥＤＬＥＶＥＬＳＤＵＥＴＯＡＧＧＲＡＤＡＴＩＯＮＡＮＤＤＥＧＲＡＤＡＴＩＯＮＩＮＣＬＵＤＩＮＧＡＲＭＯＵＲＩＮＧＡ．Ｂ．ＰＡＬＡＮＩＡＰＰＡＮ１,Ｒ．Ｊ．ＧＡＲＤＥ２ａｎｄＰ．Ｎ．ＧＯＤＢＯＬＥ３...     

EFFECT OF FINE PARTICLES ON THE VERTICAL CONCENTRATION DISTRIBUTION AND TRANSPORT RATE OF COARSE PARTICLES

ＥＦＦＥＣＴＯＦＦＩＮＥＰＡＲＴＩＣＬＥＳＯＮＴＨＥＶＥＲＴＩＣＡＬＣＯＮＣＥＮＴＲＡＴＩＯＮＤＩＳＴＲＩＢＵＴＩＯＮＡＮＤＴＲＡＮＳＰＯＲＴＲＡＴＥＯＦＣＯＡＲＳＥＰＡＲＴＩＣＬＥＳＷＡＮＺｈａｏｈｕｉ；ＳＯＮＧＴｉａｎｃｈｅｎｇＡｂｓｔｒａｃｔ：...     

MASINGA RESERVOIR IN KENYA：SEDIMENT DISCHARGE AND IMPLICATIONS FOR ITS CAPACITY

ＭＡＳＩＮＧＡＲＥＳＥＲＶＯＩＲＩＮＫＥＮＹＡ：ＳＥＤＩＭＥＮＴＤＩＳＣＨＡＲＧＥＡＮＤＩＭＰＬＩＣＡＴＩＯＮＳＦＯＲＩＴＳＣＡＰＡＣＩＴＹ￥Ｆ．Ａ．Ｏ．Ｏｔｉｅｎｏ（ＳｅｎｉｏｒＬｅｃｔｕｒｅｒｉｎＣｉｖｉｌＥｎｇｉｎｅｅｒｉｎｇ，Ｕｎｉｖｅｒｓｉ...     

WETLAND LOSS IN COASTAL LOUISIANA

ＷＥＴＬＡＮＤＬＯＳＳＩＮＣＯＡＳＴＡＬＬＯＵＩＳＩＡＮＡＭｅｎｇｌｏｕＷＡＮＧ１ａｎｄＤｏｎａｌｄＤｅａｎＡＤＲＩＡＮ２ＡＢＳＴＲＡＣＴＷｅｔｌａｎｄｓｉｎｔｈｅＭｉｓｉｓｓｉｐｐｉＲｉｖｅｒｄｅｌｔａｉｃｐｌａｉｎａｒｅｖａｌｕａｂｌｅｒｅｓｏｕ...     

MATHEMATICAL MODEL FOR SEDIMENT TRANSPORT CAPACITY OF HYPERCONCENTRATED FLOW

ＭＡＴＨＥＭＡＴＩＣＡＬＭＯＤＥＬＦＯＲＳＥＤＩＭＥＮＴＴＲＡＮＳＰＯＲＴＣＡＰＡＣＩＴＹＯＦＨＹＰＥＲＣＯＮＣＥＮＴＲＡＴＥＤＦＬＯＷＩＮＤＩＶＥＲＳＩＯＮＣＡＮＡＬＳ￥ＣＡＯＲｕｘｕａｎ；ＷＵＰｅｉａｎ；ＲＥＮＸｉａｏｆｅｎｇａｎｄＬＩＵＭｉｎｇ...     

Upper mantle flow beneath the Northwest of China and its lithospheric dynamics

ＵｐｐｅｒｍａｎｔｌｅｆｌｏｗｂｅｎｅａｔｈｔｈｅＮｏｒｔｈｗｅｓｔｏｆＣｈｉｎａａｎｄｉｔｓｌｉｔｈｏｓｐｈｅｒｉｃｄｙｎａｍｉｃｓＪＩＡＮ－ＨＵＡＨＵＡＮＧＩ（黄建华）；ＸＩＡ－ＨＵＡＣＨＡＮＧＩ（常筱华）ａｎｄＲＯＮＧ－ＳＨＡＮＦＵＩ傅容珊）（...     

VARIATIONS OF WATER SURFACE GRADIENT AND VELOCITY DISTRIBUTION CAUSED BY WATER JETS

ＶＡＲＩＡＴＩＯＮＳＯＦＷＡＴＥＲＳＵＲＦＡＣＥＧＲＡＤＩＥＮＴＡＮＤＶＥＬＯＣＩＴＹＤＩＳＴＲＩＢＵＴＩＯＮＣＡＵＳＥＤＢＹＷＡＴＥＲＪＥＴＳＨＵＡＮＧＳｕｉｌｉａｎｇ１ＡＢＳＴＲＡＣＴＵｓｉｎｇｆｌｕｍｅｅｘｐｅｒｉｍｅｎｔｓ,ｔｈｉｓｐａｐｅｒ...     

CM4模型数据与台站实测数据的对比研究

本文利用第四代地磁场综合模型(Comprehensive Model 4,CM4),计算了1982—2002年隆尧地磁台站的磁层源磁场及其感应场、电离层源磁场及其感应场的地磁北向分量X、东向分量Y、垂直分量Z,分析了各场源磁场随时间的变化特征。磁层源磁场及其感应场呈现出11年和27天的周期性变化,有些年的27天周期性变化显著,有些年则不太显著;电离层源磁场及其感应场具有明显的季节变化,不同年相同季节的变化形态一致但幅度不同;日变化分析显示,磁静日和磁扰日期间的模型数据与台站实测数据变化一致性较好,相关性较高。     

Multifield coupling model and its applications for pile foundation in permafrost

In the construction of Qinghai-Tibet railway,to avoid diseases caused by frost heave and thaw col-lapse of frozen ground,besides the normal bridges over the rivers,a lot of dry bridge structures have been built to replace subgrade in the regions of high tem-perature and high ice content frozen soil.So,the problems on forming mechanism of bearing capacity of pile foundation in cold regions already become one of hot spot problems in frozen soil engineering.Freezing force and frost heave force ar…     

Weimer电场模式在地球磁层内的特征

地球磁层中的电场是研究磁层物理的重要参数,目前常用的对流电场有均匀晨昏电场和投影电场.电离层电场可以看做磁层电场沿磁力线在电离层的投影,本文选取的电离层电场模型为Weimer(2001模式)电场.利用T96磁场模式,沿磁力线将电离层电场投影到磁层空间,得到一个新的磁层电场模式,并讨论了磁暴、行星际磁场(IMF)、太阳风参数和亚暴等对磁层电场的影响.利用该模型计算的电场结果与卫星探测结果相符.     

地磁场模型和冠谐分析

地磁场是由内源场(地核场和地壳场)和外源场(电离层场和磁层场)组成的,地磁场模型是表示地磁场时空分布的数学表达式.本文简述了地磁场全球模型和区域模型的计算方法和应用;评述了冠谐分析方法及其在地磁学中的应用;介绍了地磁场模型误差的主要来源.     

国际地磁参考场在我国地磁基础研究中的应用

国际地磁参考场资料在我国得到广泛应用。利用国际地磁参考场资料，我国学者研究了高斯分析、地球磁场模型及其源场可能位置、重磁关系、核幔耦合、地磁场能量、地球非偶极子磁场西向漂移等。在绘制中国地磁等值图中也利用了某些国际地磁参考场资料。     

新沂地电场日变化特征及频谱分析

通过对新沂地电场平静时段资料与地磁场资料对比分析,结果显示:新沂地震台地电场变化和变化磁场密切相关,其中NS向的主体变化和地磁场H分量的变化准同步;EW向主体变化虽与地磁场H分量变化有相同之处,但其变化形态与其反向,且不尽相同.运用快速傅里叶变换进行频谱分析,发现:新沂地电场NS向和EW向与地磁场H分量的优势周期存在不...     

等参函数及其在重力场中的应用

本文介绍了等参函数和等参超曲面的概念和理论,提出了更广义的平行概念,证明了平行重力场就是平面场,球面场,圆柱面场之一,平行重力场中几何水准测量不存在理论闭合差;无扰动的流体静力平衡状态下的地球重力场是平行重力场,它的物质密度分布是球对称的。     

稳定电流场的反射、透射、衍射——波动性

稳定电流场是否有反射、透射现象,它们服从什么规律,以及稳定电流场是否具有波动性等问题,本文将予以探讨。 一、稳定电流场的反射与透射 在用“电像法”解点电流源平界面问题时,一般用反射、透射的概念,并用虚源等效地代替界面,指的是全界面的、源的“反射”与“透射”,要求界面为无限平面,其结果没有普遍性。因此,尚不能当作一般的物理规律来看待。从弹性波与稳定电流场的类比中,有人曾     

Random field characteristics of earthquake occurrence and test of earthquake occurrence rate

ＲａｎｄｏｍｆｉｅｌｄｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｅａｒｔｈｑｕａｋｅｏｃｃｕｒｒｅｎｃｅａｎｄｔｅｓｔｏｆｅａｒｔｈｑｕａｋｅｏｃｃｕｒｒｅｎｃｅｒａｔｅＭｅｎｇ－ＴａｎＧＡＯ（高孟潭）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，Ｓｔａｔｅ...     

Electric field data in inductive source electromagnetic surveys

Measurement of the electric field data due to an inductive loop source in a controlled source electromagnetic survey is not common, because electric field data, usually involving grounded electrodes, are expensive to acquire and difficult to interpret. With the recently developed capability of versatile three‐dimensional inversion, we revisit the idea of measuring electric field in a large ground loop survey for mineral exploration. The three‐dimensional modelling and inversion approach helps us quantitatively understand the detectability and recoverability of the proposed survey configuration. Our detectability study using forward modelling shows that the relative anomaly (percentage difference) in electric field does not decay with a lower induction number, but the conventional magnetic field data (dB/dt) does. Our recoverability study examines how much and what kind of information can be extracted from electric field data for the reconstruction of a three‐dimensional model. Synthetic inversions show the following observations. (i) Electric field data are good at locating lateral discontinuity, whereas dB/dt has better depth resolution. (ii) Electric field is less sensitive to the background conductivity and, thus, is prone to misinterpretation because of a bad initial model in inversion. We recommend warm‐starting the electric field inversion with an initial model from a separate dB/dt inversion. (iii) Electric field data may be severely contaminated by near‐surface heterogeneity, but an inversion can recover the deep target concealed by the geologic noise. (iv) Even one line of single‐component electric field data can greatly improve the horizontal resolution in a dB/dt inversion. Finally, we investigate a field dataset of both electric field and dB/dt measurements at a uranium deposit. The field example confirms that the electric field and magnetic field data contain independent information that is crucial in the accurate recovery of subsurface conductivity. Our synthetic and field examples demonstrate the benefit of acquiring electric field data along with magnetic field data in an inductive source survey.